Effect of drought and ABA on growth, photosynthesis and antioxidant system of Cotinus coggygria seedlings under two different light conditions
作者： Yan Li , Hongxia Zhao , Baoli Duan , Helena Korpelainen , Chunyang Li
DOI: 10.1016/J.ENVEXPBOT.2010.11.005
关键词:
摘要: We exposed seedlings of Cotinus coggygria var. cinerea to drought and exogenous abscisic acid (ABA) under two different light conditions. Two watering regimes (well-watered drought), ABA applications (no with ABA) (full sunlight shade) were employed. Compared well-watered treatment, treatment significantly reduced the relative growth rate, water content (RWC), net photosynthesis rate (A) transpiration (E), but increased chlorophyll a (chla), carbon isotope (delta(13)C), endogenous ABA, malondialdehyde (MDA) hydrogen peroxide (H(2)O(2)) contents, guaiacol peroxidase (POD) catalase (CAT) activities. There was an apparent alleviation effects by shade, as indicated lower chlorophyll, MDA H(2)O(2) increases in indoleacetic (IAA) glutathione (GSH) contents. On other hand, application shade induced protective on drought-stressed seedlings, visible RWC, MDA, A, stomatal conductance (g(s)), E, delta(13)C, IAA values. In all, our results suggest that C are more sensitive full-light than shade. (C) 2010 Elsevier B.V. All rights reserved.
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